include<bits/stdc++.h>

using namespace std; int main(){

int n,b;
cin>>n>>b;
if(n%4==0&&n%100!=0||n%400==0)
{
	if(b==1||b==3||b==5||b==7||b==8||b==10||b==12)
	{
		cout<<"31";
	}
	else if(b==4||b==6||b==9||b==11)
	{
		cout<<"30";
	}
	else
	{
		cout<<"29";
	}
}
else
{
	if(b==1||b==3||b==5||b==7||b==8||b==10||b==12)
	{
		cout<<"31";
	}
	else if(b==4||b==6||b==9||b==11)
	{
		cout<<"30";
	}
	else
	{
		cout<<"28";
	}
}

return 0; }